Question

4. From the standard free energy values in Tro, Appendix 2, calculate the standard free energy changes for the following reactions at 25 °C C. 2C2H6 (g) + 702 (g) →4C02 (g) + 6H20() 2A Thermodynamic Data at 25°C Inorganic Substances Enthalpy of formati Fee energyMolar heat Molar mass, on, of f ormation, Molar entropy, Substance Alis) Al(aq) Al,Ols) Al OH)s) 26.98 26.98 101.96 78.00 133.33 0 0 481.2 24.35 524.7 -1675.7 321.7 79.04 50.92 -704.2 110.67 Sbis) 0 0 +147.75 25.23 232.78 337.80 401.94 124.78 +145.1 SbCl ,( g) bClg) 299.01 394.34 334.29 121.13 74.92 246.05 138.92 24.64 116.3 Asis), gray 888.14 648.41 -162.8 Barium 62.8 137.33 137.33 153.33 97.34 197.34 28.07 0 537.64 0 -560,77 BaOis) BaCO, (s) BaCO,(aq) 70,42 112.1 1216.3 85.35 -1214.78 -1088.59 10.81 0 -1272.8 -1137.0 62.93 50.46 3.97 254.12 67.81 -1120.3 159.80 159.80 79.90 79.90 80.91 152.23 245.46 175.02 +82.4 198.70 0 +30.91 +111.88 +82.40 103.96 20.79 HBr(g -36.40 Cals) Calg 40.08 40.08 40.08 56.08 +178.2 $42.83 635.09 986.09 -1002.82 0 +144.3 -553.58 604.03 898.49 -868.07 20.79 154.88 CaOís) Ca(OH) (s) Ca(OH) (aq) 42.80 87.49 -74.5

Answer 1

C44 Ce) C S 1193.6 KJ/mel 3) 3) H20